Common tansy (Tanacetum vulgare) is a perennial, herbaceous flowering plant of the aster family. The flowers are yellow, roundish, flat-topped, button-like, have no petals. The leaves are alternate, 10–15 cm long and are pinnately lobed, no stalk. Tansy has a stout, erect stem, usually smooth, and branching near the top.

Pictures of Tansy (Tanacetum vulgare) flowers and plants. Images and photos of Tansy.